79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/* Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <bits/libc-lock.h>
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#include <stdlib.h>
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#include <string.h>
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#include <utmp.h>
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#include "utmp-private.h"
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/* This is the default name. */
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static const char default_file_name[] = _PATH_UTMP;
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/* Current file name. */
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const char *__libc_utmp_file_name = (const char *) default_file_name;
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/* We have to use the lock in getutent_r.c. */
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__libc_lock_define (extern, __libc_utmp_lock)
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int
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__utmpname (const char *file)
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{
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int result = -1;
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__libc_lock_lock (__libc_utmp_lock);
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/* Close the old file. */
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(*__libc_utmp_jump_table->endutent) ();
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__libc_utmp_jump_table = &__libc_utmp_unknown_functions;
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if (strcmp (file, __libc_utmp_file_name) != 0)
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{
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if (strcmp (file, default_file_name) == 0)
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{
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if (__libc_utmp_file_name != default_file_name)
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free ((char *) __libc_utmp_file_name);
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__libc_utmp_file_name = default_file_name;
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}
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else
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{
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char *file_name = __strdup (file);
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if (file_name == NULL)
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/* Out of memory. */
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goto done;
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if (__libc_utmp_file_name != default_file_name)
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free ((char *) __libc_utmp_file_name);
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__libc_utmp_file_name = file_name;
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}
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}
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result = 0;
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done:
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__libc_lock_unlock (__libc_utmp_lock);
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return result;
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}
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weak_alias (__utmpname, utmpname)
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